At densities near \(k_{FQ}\) , though, neither equation of state is close to ideal.
The Quantum HadroDynamics (QHD) of Serot and Walecka [1]}, [2]}, [3]} can be
used for baryons, although to be capable of modeling a confined but chirally symmetric phase,
all chiral partners of the nucleons and mesons must be included in a parity-doubled QHD (PdQHD)
[4]}, [5]}, [6]}, [7]}, [8]}, [9]}, [10]}, [11]}, [12]}, [13]}, [14]}, [15]}, [16]}.
The quark EoS can be modeled by coupling quarks and gluons to a linear sigma model for mesons.
Such a PdQHD was considered by Cao and Liao [15]}.
